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Elastoplastic Material Modeling
This chapter provides information from preparing data to generating a material card.
Import Data
Import data files from your local system.

Welcome
Altair Material Modeler
Generating accurate material properties can be a time-consuming process, Altair Material Modeler (AMM) is a sophisticated modeling software that efficiently processes material data from testing to generate simulation-ready material cards for analyzing the nonlinear behavior of bulk materials as well as the various physical properties of materials, such as polymers and elastomers, used in the manufacture of modern products.
What's New
Here’s a quick look at the latest features available with Altair Material Modeler.
Tutorials
Discover the features of Altair Material Modeler with interactive tutorials.
Elastoplastic Material Modeling
This chapter provides information from preparing data to generating a material card.
- Basic Settings
  To get started configure these basic settings.
- Prepare Raw Data
  To facilitate effective management of multiple files of test results, you should structure the raw data by format before importing it into AMM.
- Import Data
  Import data files from your local system.
- Import Data from AMDC
  Import data files from Altair Material Data Center (AMDC) to AMM.
- Prepare Data
  Each file in the list can be edited individually.
- Curve Fitting
  Each prepared curve is displayed in the Curve Fitting list. Select the desired curve for fitting.
- Extrapolation
  AMM provides multiple mathematical models for curve fitting and extrapolation according to solver requirements. Additionally, the expert mode enables you to create strain-rate curves, failure criteria, and run validation simulations.
- Generate Material Card
  Define the material solver card properties to create a material card.
- Advanced Material Modeling
  The chapter provides information on the advanced details such as strain rate, failure, and simulation for a model.
- Side Toolbar
  Use the toolbar keys to save the session with configurations applied, reload, export curves, quit, and finish.
Multi-Physics Material Modeling
Altair Material Modeler is a collection of data fitting tools for polymers in a single cohesive studio environment with a workflow designed around using the results for various manufacturing and structural simulations including injection molding, extrusion, temperature-dependent structural simulation, short fiber multiscale modeling, and hyperelastics.
Shear Viscosity

Import Data

Import data files from your local system.

Specify the default paths of the working directories in the Settings tab. The AMM supports the following file formats:

MS-Excel (.xls and .xslx)
Data files (dat)
Comma Separated Value files (.csv)
Text files (.txt)

Select the raw data files to import. Here are some of the limits to adhere while importing the data files:

You can import any number of files in a single session, but only one import is supported.
Only one curve per data file is supported.

Click Import.
You can import any number of files in a single session, but only one import is supported.
In the Define column and starting row dialog box, specify the start poistion of the measurement data from the data file.

Note: The Column Displacement defines the engineering strain and Column Force defines the engineering stress.

The imported files are displayed in the list box.
Figure 1. Import Raw Data Files
Specify the start position of the measurement data from the data file. Enter the initial column and row numbers as shown and then click OK.

Figure 2. Column Displacement

The imported files are displayed in the list box and the curves are plotted in the main graphics area.

Figure 3. Engineering Curves for the Imported Data